Difference between revisions of "Octopus Tester"

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* Classic Octopus Tester
 
* Classic Octopus Tester
 
** Based on [http://n5bl.org/pipermail/builders_n5bl.org/attachments/20150514/6b8107e1/attachment-0001.pdf design example (N5BL)]
 
** Based on [http://n5bl.org/pipermail/builders_n5bl.org/attachments/20150514/6b8107e1/attachment-0001.pdf design example (N5BL)]
* Scope set to X-Y for voltage-vs-current measurement of part
+
** [https://download.tek.com/manual/071011401.pdf Tektronix TR 210 Manual]
** Look at scope pattern for device signature
 
 
* Out of circuit component tester
 
* Out of circuit component tester
 
** Useful for matching parts like diodes
 
** Useful for matching parts like diodes
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** Pot adjustments to set current (accommodate transformer and line voltage variances)
 
** Pot adjustments to set current (accommodate transformer and line voltage variances)
 
* 2 BNC jacks
 
* 2 BNC jacks
** Timebase = XY
 
** Connect to XY on scope (X=CH1, Y=CH2)
 
** CH2 gets set to INVERT
 
 
* Plus, Minus Banana jacks
 
* Plus, Minus Banana jacks
 
* AC powered
 
* AC powered
 
** C13 jack with switch
 
** C13 jack with switch
 
** 1A Fuse
 
** 1A Fuse
* Build into [https://www.mouser.com/ProductDetail/Bud-Industries/CU-1945?qs=YiMYZbOAr7eNf%252BiShkuUjg%3D%3D Bud Box CU-1945]
+
 
 +
=== Scope Setup ===
 +
 
 +
* Scope set to X-Y for voltage-vs-current measurement of part
 +
** Press button above time adjustment knob
 +
** Time Base XY
 +
** Look at scope pattern for device signature
 +
** Shows voltage/current phase relationships
 +
** 50 mS timebase
 +
** Connect to XY on scope (X=CH1, Y=CH2)
 +
** CH2 gets set to INVERT
 +
 
 +
== Schematic and Values ==
 +
 
 +
[[file:OctopusTester_SCHEM.PNG]]
 +
 
 +
* Adjust RV1/RV2 for total resistance (fixed resistor plus pot)
 +
** 891 - 1 mA switch setting (RV2)
 +
** 8910 - 10mA switch setting (RV1)
  
 
== X-Y Patterns ==
 
== X-Y Patterns ==
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[[file:OctopusTester_Zener-02.png]]
 
[[file:OctopusTester_Zener-02.png]]
 
== Schematics ==
 
 
[[file:OctopusTester_SCHEM.PNG]]
 
 
* Adjust RV2/RV2 for total resistance (fixed resistor plus pot)
 
** 891 - 1 mA switch setting
 
** 8910 - 10mA switch setting
 
  
 
== Cutouts on Bud Box CU-1945 ==
 
== Cutouts on Bud Box CU-1945 ==
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<video type="youtube">R95f9gGFUGI</video>
 
<video type="youtube">R95f9gGFUGI</video>
 +
 +
== Parts ==
 +
 +
* [https://www.mouser.com/ProductDetail/Triad-Magnetics/F-13X?qs=b1anAsPanWz99oSBmlGHww%3D%3D Typical transformer]
 +
** 1.38 in L, 2.38 in W, 1.38 in H
 +
* Build into [https://www.mouser.com/ProductDetail/Bud-Industries/CU-1945?qs=YiMYZbOAr7eNf%252BiShkuUjg%3D%3D Bud Box CU-1945]
 +
** 6.21 in W x 3.76 in D x 2 in H
 +
** Comes with screws and rubber feet
 +
* (1) Black, (1) Red binding posts
 +
* (2) Chassis mount BNC connectors
 +
* C13 AC jack with switch
 +
* [https://www.ebay.com/itm/273507122080 5x20 Fuse holder]
 +
* 1A fuse (5x20)

Latest revision as of 20:50, 5 September 2021

P1798-crop-720px.jpg

P1070804-crop-720px.jpg

Features

  • Classic Octopus Tester
  • Out of circuit component tester
    • Useful for matching parts like diodes
  • In circuit component tester
    • Test 2 units and compare signatures on scope
  • Use 6.3V "filament" transformer
    • 8.91V - Vpeak
    • 17.82V - Vpeak-peak
  • 1mA, 10mA "scale" switch
    • Pot adjustments to set current (accommodate transformer and line voltage variances)
  • 2 BNC jacks
  • Plus, Minus Banana jacks
  • AC powered
    • C13 jack with switch
    • 1A Fuse

Scope Setup

  • Scope set to X-Y for voltage-vs-current measurement of part
    • Press button above time adjustment knob
    • Time Base XY
    • Look at scope pattern for device signature
    • Shows voltage/current phase relationships
    • 50 mS timebase
    • Connect to XY on scope (X=CH1, Y=CH2)
    • CH2 gets set to INVERT

Schematic and Values

OctopusTester SCHEM.PNG

  • Adjust RV1/RV2 for total resistance (fixed resistor plus pot)
    • 891 - 1 mA switch setting (RV2)
    • 8910 - 10mA switch setting (RV1)

X-Y Patterns

XY Patterns.PNG

Resistors

  • Resistor - slope line
    • Slope = resistance value
  • 1 mA setting = 8901 ohms, 1:1 slope
  • 10 mA setting = 890 ohms, 1:1 slope

OctopusTester Resistor.png

Capacitors

  • Oval shape
  • 0.3uF, 60 Hz, 8841 ohms
  • 3uF, 60 Hz, 884 ohms
  • 1 uF cap, 1mA selection

OctopusTester Cap 1uF-01.png

  • 1 uF cap, 10mA selection

OctopusTester Cap 1uF-02.png

Zener

  • 3.9V Zener
  • 1 mA switch setting

OctopusTester Zener-01.png

  • 10 mA switch setting

OctopusTester Zener-02.png

Cutouts on Bud Box CU-1945

OctopusTester FRONT-BACK.PNG

Videos

Parts

  • Typical transformer
    • 1.38 in L, 2.38 in W, 1.38 in H
  • Build into Bud Box CU-1945
    • 6.21 in W x 3.76 in D x 2 in H
    • Comes with screws and rubber feet
  • (1) Black, (1) Red binding posts
  • (2) Chassis mount BNC connectors
  • C13 AC jack with switch
  • 5x20 Fuse holder
  • 1A fuse (5x20)